Re: BJT transistor beta, vs Ebers-Moll, Gummel-Poon, and the other tools God has given us

From: Don Pearce (donald_at_pearce.uk.com)
Date: 12/07/04 

Date: Tue, 07 Dec 2004 21:29:18 GMT

On Tue, 7 Dec 2004 21:13:18 +0000, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

>I read in sci.electronics.design that lemonjuice <exskimos@anonymous.to>
>wrote (in <1102452791.496261.141710@z14g2000cwz.googlegroups.com>) about
>'BJT transistor beta, vs Ebers-Moll, Gummel-Poon, and the other tools
>God has given us', on Tue, 7 Dec 2004:
>
>>Really. From what I can remember dIb/dVbe is constant for the most
>>important intervals of Vbe.
>
>You need a memory upgrade. The base-emitter junction is a diode. Do you
>think a diode obeys Ohm's Law in its conducting direction? dIb/dVbe =
>constant defines an ohmic resistor.

Everything obeys Ohms law. Whatever the condition, V/I=R. OK, so R
changes - V and I change accordingly. Ohms law is still obeyed.

d

Pearce Consulting
http://www.pearce.uk.com